Hi Nicolai, [auto build test WARNING on next-20160317] [cannot apply to v4.5-rc7 v4.5-rc6 v4.5-rc5 v4.5] [if your patch is applied to the wrong git tree, please drop us a note to help improving the system]
url: https://github.com/0day-ci/linux/commits/Nicolai-Stange/usb-core-usb_alloc_dev-fix-setting-of-portnum/20160318-062419 config: i386-randconfig-x017-201611 (attached as .config) reproduce: # save the attached .config to linux build tree make ARCH=i386 Note: it may well be a FALSE warning. FWIW you are at least aware of it now. http://gcc.gnu.org/wiki/Better_Uninitialized_Warnings All warnings (new ones prefixed by >>): drivers/usb/core/usb.c: In function 'usb_alloc_dev': >> drivers/usb/core/usb.c:505:22: warning: 'raw_port' may be used uninitialized >> in this function [-Wmaybe-uninitialized] dev->dev.of_node = usb_of_get_child_node(parent->dev.of_node, ^ vim +/raw_port +505 drivers/usb/core/usb.c 4a0cd967 Sarah Sharp 2009-09-04 489 if (port1 < 15) 7206b001 Sarah Sharp 2009-04-27 490 dev->route = parent->route + 7206b001 Sarah Sharp 2009-04-27 491 (port1 << ((parent->level - 1)*4)); 4a0cd967 Sarah Sharp 2009-09-04 492 else 4a0cd967 Sarah Sharp 2009-09-04 493 dev->route = parent->route + 4a0cd967 Sarah Sharp 2009-09-04 494 (15 << ((parent->level - 1)*4)); 7206b001 Sarah Sharp 2009-04-27 495 } ^1da177e Linus Torvalds 2005-04-16 496 ^1da177e Linus Torvalds 2005-04-16 497 dev->dev.parent = &parent->dev; 0031a06e Kay Sievers 2008-05-02 498 dev_set_name(&dev->dev, "%d-%s", bus->busnum, dev->devpath); ^1da177e Linus Torvalds 2005-04-16 499 69bec725 Peter Chen 2016-02-19 500 if (!parent->parent) { 69bec725 Peter Chen 2016-02-19 501 /* device under root hub's port */ 23f4c0b9 Nicolai Stange 2016-03-17 502 raw_port = usb_hcd_find_raw_port_number(usb_hcd, 69bec725 Peter Chen 2016-02-19 503 port1); 69bec725 Peter Chen 2016-02-19 504 } 69bec725 Peter Chen 2016-02-19 @505 dev->dev.of_node = usb_of_get_child_node(parent->dev.of_node, 23f4c0b9 Nicolai Stange 2016-03-17 506 raw_port); 69bec725 Peter Chen 2016-02-19 507 ^1da177e Linus Torvalds 2005-04-16 508 /* hub driver sets up TT records */ ^1da177e Linus Torvalds 2005-04-16 509 } ^1da177e Linus Torvalds 2005-04-16 510 12c3da34 Alan Stern 2005-11-23 511 dev->portnum = port1; ^1da177e Linus Torvalds 2005-04-16 512 dev->bus = bus; ^1da177e Linus Torvalds 2005-04-16 513 dev->parent = parent; :::::: The code at line 505 was first introduced by commit :::::: 69bec725985324e79b1c47ea287815ac4ddb0521 USB: core: let USB device know device node :::::: TO: Peter Chen <peter.c...@freescale.com> :::::: CC: Greg Kroah-Hartman <gre...@linuxfoundation.org> --- 0-DAY kernel test infrastructure Open Source Technology Center https://lists.01.org/pipermail/kbuild-all Intel Corporation
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